Hatch cover



April 18, 1933- J. w. [SHERWOOD ETIAL 1,904,735

' HATCH COVER ,Filed Dec. 11, 1951 8 Sheets-Sheet 1 gwuemto'a Jase v70Wfikemvoocfla Willam jkerwoool.

.8- Shets-S-heet 2 J. W. [SHERWOOD ET AL HATCH COVER Filed De o.

' abbmq April 18, 1933.

April 18, 19331 J. W. ISHERWOOD El AL HATCH COVER Filed Dec. 11, 1931 BSheetS-Sheet 3 Zlwuantozc Jsepk Wlsherwaoafi'w Bkerwooai.

April 18, 1933- J. w. ISHERWOQD El AL 1,904,735

HATCH COVER Filed Dec. 11, 1931 s Sheets-Sheet 4 gwwntow JbsepkWIS/IBIWOOJ Jkerwood.

April 18, 9 J. w. [SHERWOOD ET AL 1,904,735

HATCH COVER F-iled Dec. 11, 1951 8 Sheets-Sheet 5 gwucntow W e/sephWIs/zerwvodw 76. 1 Willialrb [S'fiern ood. as,

April 18, 1933 J. [SHERWOOD El AL, 1,904,735

HATCH COVER Filed Dec. 11, 1931 8 Sheets-Sheet 6 fo1sep7z WfikerwvodwWilliam likerwo't al.

April 8, 1933. J. w. [SHERWOOD ET AL 1,904,735

HATCH COVER Filed Dec. 11, 1951 8 Sheets-Sheet 7 It 26. L y 19 m 1gwuantow Jbsqok WZ/wrwaodfi; William .ZSkerwoad.

April 18, 1933. J. w. isHERwooD ET AL HATCH COVER Filed Dec. 11, 1951 8Sheets-Sheet 8 Patented Apr. 18, 193?; i Q i i i i Q JOSEPH WILIzIAMISHERWOOD, enn winnmiyiiisfinnwoonhrisAeenns-woon y @crns EH RsT ENqrAnny la Harm coves Application filed December -11, -1931 ,--Seria1'No.580,448, Sand in Great Britainuanuar '15, 1931.

II have filed application inGreatBritain Fig. lis-atopzplanviewsofonewof th'e sec January '15, 1931'. tions ofwhich ahatchvcoveriisformed;

This invention relatesto hatch'covers for Fi gs; 2 and3are-respe'ctivelya partialzside floating vessels and has-for its objecttoproelevation'andanvend elevation of the cover vide an improvement over the constructionssection-illustrated in Fligwl; disclosed :in our'U. 5. Letters PatentNo. Fig. 4 is a diagrammatic top planviewwof 1,679,526 granted August 7,1928 entitled aih'atch'opening illustratingthe application Hatch cover.j f. fih plurality "of covenlsections. toclosethe According to the;presentzinvention the secsame several of thesetions being'absent-and 19tions of'the cover are adapted to so cooperate other :of the sectionsbeing shown fragmenwith one another that when oneof them is tarilyinorderrto'show the 'websforlsupportprevented from lateral movement; thereingthesections; 2; Y mainder are thereby held in locked. position: .Fig.w5 is adiagrammatic.vertical'sectional; This isbrought about byconstructions simple View through'the "hatchway and taken ypar-I I e inoperation and :cheap :in manufacturing allel to one ofthesupportingpwebs; it 1: Costa 1 i g. 6" 'sadiagrammatic'vertical'sectional a 'Inone wayof carrying outthe-invention," View through theflhatchwqayfand' taken :at some oftheihatchsections are provided with rightangles'toathe supporting webs;I slots or recesses, or with promotions forms, ig. l7 is "anenlargedjdetail in section of ing locking pieces adapted to be engagedthe-support andzlocking arrangenient onga m' 4c ing locking pieceswhichfengage slots or'reher 1; q i

' andtherebyrsecured'byxprojections forming Web',"of theendsoftwosadjoining cover see locking pieces, or slots or recesse's onfixed tions; 1 1 it 1 parts of the hatch such for example asthe ig. 8 isa fragmentary diagrammatic side hatch webs :and coamingwhenthe'hatchsemelevationalgviewbfoneoftheiwebs andpartions areamoved into position; andmeans are tlcularlyillustrating thereon" a, pluralityi iof provided fornormallypreventingthese hatch wedge-shaped:eengaging pieces .fo'rholding sections from moving out'of position. This theseveralcoverxsections in locked fposition; V may be efiected'bythe otherhatchs-ection or Fig. 9is afragmentaryip rgp ti i i sections,0r by abaror other filling piece; i detail of alockingmemhe'r 41-. carried byawebPreferably the hatch section :or sections, and its ,slidable relation toa lockingattach or thebar or other filling piece, isor arepro m n l riy, a 1 section; I v1; vided with means for looking it or them in Figs.10, 11 and 12 are respectively aside position. n p elevation, transversesection, and atop In a modification someof the hatch secplan View ofthemember :4 shown in Fi 'rg tions are held in positionby adjoining hatchin 1-full-1ockingposition A c, it i sections which'a're secured-whenmoved'into wFig 13 is 5a -view fsirnilar'to Fig, ,11 but; position; Forthis purpose'some ofthe sectaken through the ;:pivota1 catchfor prevent-I tions may be provided withprojectionsforrm mg di pl cem nt out of thelockingimem- 1 cesses in other sections. a v Fig. 14 is a perspectivedetail: view of the" :Referring to the accompanying drawings end ofacover section inwhichihasvbeen cut a forming a part ofthis specificationin which a T shaped slot=for"engagementwith a 10Qk like referencecharacters designatelike parts ing mem'ber carried by a :web;

45 i llth views,ras for example A represents aFig. 15is a vertical,sectionalviewtaken the sectionsof which a hatch cover is formed,transversely through a eb and illustrating B represents the Webstersupporting the seche engagement referred tointhe description Lions, (1'represents the hatchco aming, ,andyso of fFig. 14; A Q v ones will beclear from the gfollowingda Fig; 16 is aside -elevationaldetail-eta webription;-- illustrating the locking memherfgsecured; V

' l i baa-toad mem n -t p C- i an'engageable cover section;

Figs. 17, 18-and 19* are-views; similar re- 'spectively to Figs l l', l5and 16 but illustratthe coaction of the fweb-carried locking member witha modification ot the Tshaped Z'SlOt construction carriedby'aico'verisection -Fi' .20is$v1 I; but illtistrating a slidablelockingmernber of 1 i v 0 E'ew somewhat similar to Fig-9 dumb bellformatlon and'engageablewith a T shaped slot on the end ofa coversection Figs 2l, 22' and 23 are details more clearly I showing'thelocking engagement ot the parts mentionedinthe description-0f Fig.

' 15 V f modificationsjof the slot. construction illnstratedrespectivelyiin' Figs'14'and317;

' Figs. 26 g and Figsj 24'andare deta l iews showing 27: are" viewssimilar-I to "Figs.

10 and-13but lllnstratinga modification of the pivotal catchconstruction on the; webs;

carried locking member;

" 'Fi'g 28 illustrates a-difi'erentmeans' 'oii'so;

V curing the cover sections in engagementwith ing'mortise and tenon'modified engagement the web-carried h1g5 v2illustrated Fig- 8; .1.Figs; 29, ,30'and,.31 are views clearly show- 7 of {two adjacent coversections particularly useful in smaller e hat'chwaysf: and accord1ng eable from theweb I J towhich' the lugs1, 2: may beieliminated arematerially reduced-innumber; and

- Figs, 32 to 39 inclns'ivelare detailEVie si lustrating-yarious'modified formsoii cona strnctionienabling the cover-sections to be shda'readily into:p0s1t1on,:-sa1d views further;

showing a separate channel member remow andlrcarrying; the; locklngmembers and/ or securing lngs'2 engageable with the cover sections;

' 'morejstiiiening grooves, suitable lifting means. AttachmentsReferring 1 more flparticlilarly V to 13,:the sections 1A aregformed wth vone or as idesired,-iand' erably wedge-shaped ;lugs,"are securedto'the,

sections, andin order'that the sections may be'interchangeable, thewedges I01 lugs Jare preferably sloped -in" both". direct1ons,: as

shown."

: Referring respondingly'wedge shaped engaging pieces 2ar-e'secnred sothat when'the closing section on eachl bay 'Dis placed in position', and

preferably locked bya locking arrangement,

the whole of the covers aretherebyheld in locked position.

InFignres 913 there is"illi1strated one 'form or locking" device #Inthis construction} 1i 10nnted,;in such a manner that they can be movedinto position to cooperate with i the] thewebs B are provided withslotsf 3 in which wedge-shaped lockingfpieces 4 are-slidably lockingpiecesl on the 'closingisectiohl order to ho'ld the locking, pieces 4 inlocked and positions? pivoted; locking 1, prefnow; to 1 Figures 48, onhatch:

a r webs B and/Oronth'e-hatch coamings G, cor-l Qcatches 5 are provided,which d rop intoslots l 6,7 fin;the webs. B or the coaming O. Y Figures1'4j16 show an; arrangement in which one or more flanges or ends of thesec- I V a '70 tions have 'T-shap-ed slots 6(, andthepiec'es 2are-snitably-shapedtoenter and engage these "slots, so that the coversmay be slid in tion. I

e Alternatively, in tia'br forming the slots (either direction intowedged holding posiin theffianges, attachments 8 may be secured i Vtothefianges ofthecoverssee Figures 17-19, the attachmentss having theslots 6. formed x .1 therein, thus creating a poclret for ethe receptionof the engaging pieces 2' I v -Theclosing sections.are. held in lockedpomountedin slots 3 in the. webs B oracoaming {3, see Figures 20-23, It:should be. ob} H I served that this secure nent of the closing parallellockingkasshown in Figure 20, or cam-locking'as shown inFignre 21 i Inthe 'm'odificati and 25, the Ti-shaped slots 6 are replaced by L'shaped-grooves 10, which areformed on shown ingFigures f A 'sition by"locking pieces-9 which are slida'bly 'section may be accomplishedeither through Y in the fi'angesof the sections as shown in Figure 24,.0r are formed in-;;attachmentst .8

secured-to the flanges as shown: in .Fignre that shown in Figure 9 and'the'refore may,

2 5.- "The closingsectionmayr-be similar to in thisfconstru'ction,be}.lockedibyilthe- {LIT-1 rangementshowniin Figures 9-13, oriit may.

ures 26-27 wherein the pivoted :lat'ch 5 is replaced bygage fixedpiece'si2xonthe webs B on oam':

11- which; are dropped between-any twoadj a centsections or' between theends of the s ec-. tions' and the coammg; These bars may be iprovided-with any convenient locking means, 1 v

"such as alocking bolt;

2I9 81', some of thesections have slots formed be lockedby thearrangement shown in Fig 51111 the "modification shown mfri gurs loo ayerticallyeslidableddrop latch V I 'in one side flange to bevee'ngagedby project I ingtongnes 121;0nthe adja ent'sectionsi, In

this modi fication there is no necessity to pro I yide locking pieces lon these sections, nor

their corresponding" pieces 2, since'they terlock with each other.

Injorderto enable the sections tote slid into position as, for example,from thecen ter of thejhatch to the side coamings, or vice versa, the"modified arrangements shown in Figures 32 39 in'ay ,beemp1oyed, which.the'iWebsB and/orcoamings'G are provided with" guide, pieces for"jfthe' sections, and in which'the pieces'2 are formed on whichcan-beremoyed ainember' v In Figures and 33, the piecesi2ssare se cnredto channel members, 1 3. wh1cl1 canxbe removed from Ithe webs Land or 1'coamings and;the"webs: and o-rcoamingsare {provided with guide :pieces14 which i guide the sections while they are being slid: into Fposition} In Figure-34; in place ofjxproviding ithe guide pieces l iytheflanges of the sections/are cut away as indicated at215 forpositioningonthe-webs B. 7 7 l In Figures '35=and 36,;guidepieces =j16 are providedwhichare recessedito accommodate tongues 17 I on'rthe sections. In thisarrangement the tongues are formed byfcutting away the flangesof thesections. :In Figure 37 the tongues are formed as sepanateimemberssecured to the flanges of zthe sections 1 and may,-as shown in Figure38,"Lbe.enlarged' at their outer edge. lniFigure '39. the tonguesare'formedvon'theipiecesil. g

It is obvious that1tl1oseskilled in "the art may-Vary the details:of'construction as :well as arrangements of parts without departingfrom the spirit of .the invention; sand therefore it is notdesired'torbelimitedito the=.fore- V] hatis claimedgis:' a i i i 1. In ahatch provided with framing-"the going exceptas may be required by theclaims combination ofa cover comprisinga plu' rality of small sectionstwo of which constitute closing sections; and cooperating wedging meanscarried by the sections and the hatch. framing for T holding thesections in place, one of said'means slidablerandwpro- Vided with .a"transversely operablelatch for looking all of: said sections; i

2. In a hatch provided with rcoamingi and web framing the latterdiyi'ding the hatchway into bays the combination ofra cover comprising aplurality of; sections with :a closing section 'for each bay, eachsection provided with means for holding it inipla'cerelativeito the jcoaming and the framing; stationary means onthe coaming' and'the;framing for e co engagement with the holding means ofthe sections otherthan the closing-sections; 'slid-;

able means onitheicoaming and the framing cooperating with the holdingmeans of: :the closing sections for securing allof said: sec

- tions in place; and :means operable trans- 3 on the coamingandtheframing vfor co.-en-

gagement'with the holding means'of the sections otherthan the closingsections; and slidablemeans on the coaming and the.'fram ing cooperatingwith atheiholdingimeansi of thefclosing: sections :formsecuring all:ofzsaid Vided with means forhh'ol'dingfiit' iniplace'irelw' sectionsinaplaceithe isliiilablmmeansaont framingaadaptediforsimultaneonsaco'operation with two;closingssections. v I

web framin'gx the :latter. idividing the hat ch-Y fig way into bays 1the combination I of a cover comprising a pluralityof sectionswithaclose ing 2 sectionrfor each .ibayyeachw section ripro tive'itothecoaming andftheiframing stationany, means on the coaming" andthezfra'ming for co engagementawith'the holding means: of the section'sother;than athe closing sections;

andislidablefmeans onztheicoamin'gandthe- 'framin cooperating withtheiholdinglmeans 155i ofithe c osing sections-zforsecuringiallotsaidsections in place,"the 'slidable means ion; the framing: adapted: .forsimultaneous cooperation with: a plurality .of 1closin'g;sections.

Y 5. In a'hatchlprovidedlwithzcoamingnaiid fgs web framing the latterdividingifthefhatchway into. bays the combination r are covercomprisingia plurality of'isectionsiwithia closing section vfor eachbay, eachssection "provided with meansrfor'holding it place relative ptosthe 1 coaming and 1: the framing; stationary means i on the (coamingiandi the framing for col-"engagementwithithehblding means of thesectionsotherithanlthe closing sectionsg r and slidablemeans on thecoaming i5 and the framing cooperating with the: hold-: ingxmeans of theclosing sections.:.for; securing all of said sections .inkplace; the islidable means on'the framing'mounted:in aislotway '1 and adapted -forsimultaneous: cooperation 'gb o with two closin'g'sectionsa 6. In a-:hatch thei'combination of afram-i ing element extendingvacross thehatch a cover comprising a plurality" ofasectionsuare ranged in rows onopposite sides aof-andsup 5 5 ported :by said 'fra-ming element, eachrowcontaining a closingsectio-nior holding the sections of that'irow inplace; and-a member slidably mounted on said framing element to engagesimultaneously :the closing: sectionsino of adjacent flows :to: look all:of the-sections thereinL i i '17 -1Inia;1hatchthecombinationofaframingelementaextending :across 'thehatch and; pro:

videdzwithaslot; m ver comprisingaplu i- 1d rality ofisectionswarnanged:lIliIOWSa'OIl oppoe sitesides of: and supportedgby: said framingelement,-each rowicontaining a'closing section for "holdingithesectionsof that row in place; and a member slidablymounted: lIlFthG i slot of.said framing-element: and provided with enlarged ends disposed onopposite sides of said element, 1 said i ends to 1 engage simultaneouslycooperating locki-n-g portions on-theclosing sections of adjacentrowsitolock all: ofthe-sections therein. a

*8. "In. a hatch the. combination :of a tram ing element(extendingacrossv the hatch and provided withaslot; a cover-rcomprisin-g-a a plurality ofvsectionsnarrangedxin; rows 1 on 1 30ilniiaihatchiprovidedfiwith coamingiand'v 1. .5 '1 nra ing elementopposite sidesof-and supported by-said frame 7 c ing element; eachv:roiv containing.enclosing section for .holding,thesectionspf that rowin place and a member lsl-id ablyqmounted'on said :framingfelementwtoengage "simultane- J in j 9 shaped :member slidably'v mounted in'athe;slot of said framing 'element;i the'enlargedends I a V v i disposed onopposite sides of: said element,

said'ends-to engage simultaneouslycooperv ating' l0cking-p0rtionsonlztheZ closingseG 'tionszof adjacent WS olockall oi hejseci 'therem. 4a

ing elementfextending across abs hatch and provided withlia slot; acoverecomp'risingiia plurality- :of: f sections arranged rows toriopposite'si'des of and supported bysaid"tram}v E 9 ing-element,ea'chfrowicontaining;air-closing section: for holding the sections. ofthat row in-'-pl-ace, each closing seetionihavinga bay.- onetslot atone. end thereofz; and a substan- 1:3 mounted in the slot :o fsa'idtramingelement, the n ge nds disposed-0n: ite sides v Vtionsioffadjacent 3549 tions ltherei-n;

1-1.- Ina hatch the combination of a fram extending across the hatch:and r providedfwith a slot;ia'covercomprising a plurality ofsectionsarranged lnl'OWS on ope Q 'posite sides of and supported: bysaid-tram;

c 'ing-"element, each row: containingasclosing section for holdmg thesect1onsofthatrow in "I place,' eachclosing section havingia bayonetsl'ot'atfoneiend thereof; andr'azsubstantially 7.2.159 'dumb bell shapedmember ;slidably Emounted inthe slot- 0f said framingelement,theen:

7' said element, said-fiends" having surfaces to engage simultaneouslyand cooperatively '-.':i corresponding surfacesof the closing sectionsof adj acent rows to -loclr all of the sections 1 therein.

, 12." In a hatch 'thev 'conibination oi air-am ing element extendingacross the lliLiJCllifllld plurality of 'sectionsarran'ged in rowson opcposite sides of supported by said: fram 1 provided with a slot; "a covercomprising a 7. ing: element, each I'OW' containing a closing:secti'onior holding the sectionspf that row place; each-closing sect onhav nga bayo V I 1 v or; able of thevslid-ableLmemberto secure tch theecombination offa framefv larg'ed' fends disposed on oppositdsides of netslot'at-,.one end thereofjianda substa n vti'ally dumb-bell j shaped"member slidably mounted in the slotofsaidfframing'element,

the enlarged endsdisposedfonoppositesides of said element, saidendshaving'inclined surfaces to engagesimultaneouslyand-Wedge is inglythe similarly Vformed corresponding surfaces "of the;closing-' s'ectionsofadj acent. .rowsto lock allof the sections therein.

w 13. In a hatch the combinationofa-framing element. extending acrossthehatch, and

providedith as1ot;' a cover comprising, a plurality?ofssectlons arrangedin rows on opposite sidesijofsand supported by said training. element,each row containing ajclos ing section for holdingthe sections of that Irow ;-inplace a: substantially dumb-bell shaped member slidablyfmountedin the slot of said framingelement, the enlarged ends V disposedon'oppositei sides of said" element x f to,engage' simultaneously theclosing secl nation of a frame so i ing element extending acrossthehatch and 7 provided w ithi a eslot-iarcover comprising a plural ty ofsections arranged in rows on op posltesides of and supported by saidframinglelement, each row containing a closing sectionsfon holding thesections of that row in place ;=i= a substantially dumb bell shapedmember-slidably-mounted in the slot of said iramlng element, theenlargedends disposed on opposite sides ofrSaidelementto engage loosimu'ltaneouslylthe iclosing sections. 'ofvad-jace'ntfrovvs tolo'ckallotthesections' thereein; and/a latchtrainsversely' operable of the Yslidable member to'secure the latter in look 7 1 ing' positiomwsaidlatch c'oengaging said member andr said element; a r c .15.=Ina-hatchthe combinationof-a fram c ing element extending 'acro ssthehatch and provided 'yvith. a slot; a vcover comprising a plurality? ofsections arranged inzrovvs on opposite-sides;ofrandisupported saidframing element,'each -rovv containinga' clos- I ingsection forholdingthe se'ctions: of that A row in icplace; a substantiallydumb-bell of said framing element, the enlarged ends shaped member'slidably' mounted in theslot disposed onop'p osit'e" sides'zof said.element to engagesimufltaneously the closing sections of vad acent'rowsto lock "all of the sections thereln'; and anlatchmounted upon oneof of the slidable membfft Secure the latter in lockingpositi -f 16.Inafhatchthecombinatioliofa framing' element extendingacrossthe hatchcand provided with a slot; acover comprisingva ing element, .each l rowcontaining a closing a said enlarged ends buttransversely operablesection for-holding the sections of that row in place; a substantiallydumb-bell shaped member slidably mounted in :the slot of said framingelement, the enlarged ends disposed on opposite sides of said element toengage simultaneously the closing sections of adjacent rows to look allof the sections therein;

and a latch pivotally mounted upon one of said enlarged ends buttransversely operable of the slidable member to secure the latter inlocking position, said latch engageable with said element.

17 In a hatch the combination of a traming element extending across thehatch and provided with a slot; a cover comprising a pluralityoflsections arranged in'rows on opposite sides'of and supported by saidframing element, each row containing a closing section for holding thesections of that row in place; a substantially du'mb-bell shaped memberslidably mounted in the slot able memberto secure the latter in lockingposition. I a

18. In a hatch the combination of a traming element extending across thehatch and provided with a slot; a cover comprising a plurality ofsections arranged in rows on opposite sides of and supported by saidframing element, each row containing a clos ing section for holding thesections of that row in place; a substantially dumb-bell shaped memberslidably mounted in the slot of said framing'elem'ent, the enlarged endsdisposed on opposite sides of said elementato engage simultaneously theclosing sections of adjacent rows tolock all of the sections therein;and a latch comprising a slidable yoke mounted upon the enlargedends andtransversely operable of the slidable mem-' ber to secure vthe latter inlocking position, said yoke bridging said element.

19. In a hatch the combination of framing;

a hatch covercomprising a plurality of sections, the framing and thesections provided with cooperating holding means, said sec-.

tions arranged in groups, each group includ mg a closing section formaintalning'sald means operable, one end of each closing sectionprovided with a surface which when engaged will secure that section tosaid framing; and a member slidably mounted on said framing to engagesimultaneously the surfaces of two closing sections to lock all of saidsections. V i p r 20. In a hatch the combination of a cover comprising aplurality ofsmall sections arranged in plural groups, a section in'eachgroup constituting'a closing section; stationmeans for holding jfthesections the closing,sect ons,- sald means; earned by ary, means tonholding the sectiens. of a group otherthan ,the closing, section; b andslidable means zengagingjthe closing {Sections of a' 'p-lura-lity of'groupsipfor securing the remaining sections of saidplurality-pf groups.

comprisinga plurality, of; small visectionsnanranged in. plurallgroupgla, section in each group constituting, a closing. section 2; station-Iary-wedging means fonholding the, sections of e 21:" In 'iihat liiihmetasta-anal:4

s f p e her-than t ei l i s ti siai d d b 11184113v d inely en eeinethe1 ing sections of a plurality of'groupsforsecun ingthe remaini g ierctionsofsaid plurality-of groupsgf p, "I I; f 22. ln aahatch providedwith ,coaming and section s. provided fat {an 11 holding tthe section ap 1 stationary other than the coaming and} the framing,andadaptedtoframing the; combination of f a; cover; corn prisingga' plurality.ofsmall Esectionsarranged in plural groups a] section gin} each groupconstituting; a closingsectionfeachl' of said i dlwiithfmeansjfor coactl{with thej e nds ofisaid sectionsf and slidable means engagingthe.ends':'of-. 'the clos inghsectionsofaplurality:oflgroupsfor ser.'95- curing. the, sections of salid f rality of "groups,- said'slidablemeans likewise carriedlby-the coaming andfthei iraming,

comprising a a: filliiralityfofi small 1 sections; ar

ranged ,plnral; groups, 1,3, section in'feach" group; constitut ng, aclosing, section; stas 5 23. Ina lhatch; th e lcombination ofja icov'rtionary meansi i for Holding, theisections of A r a -Z plurality Iofgroups, forf securing ;;the re-;

ma -p f flk iai the le a' tie ;'J if rable,meansfengagingtheclosingisectionsiof v a a a 9 I mainingflsections;fand means for.lockingthe slidablemeansml a e p 24;. e In a hatehjthe combination ofacover comprising, a plurality pf"small sectionsab ranged in pluralgroups, a'sectionyinfeachtionary "means; for. holding, the sect :of a

group Cam inas :ui g closing? secti0n;; fs1id I able means engaging the,closing f lsectionsfof plu l ty cfigm p ib'z. sec g the e mainingsections; and l pivoted." means jcar'g v a i p k n he y w riedlby' theslidable means: i" latteri a 25'. In a hatclithe actives w a comprisinga plurality of small sections two f whi h constitute closing sectionsand Y plural meanswronevof; whichv is slidablei for locking alloffsa'idhsectionsvtogether; j

slidable means adapted for simultaneous co operation with the twoclosingsections,

26. In a hatch the combination eta-cover l comprisinga plurality ofsmall sections two of which constitute closing sections; pl ural meansone .of-whichis slidable for locking all of said sections together, theslidable?

